What is a system for ordering items that have little or no value at the end of a sales period?

The correct answer to the following question will be the "single-period inventory model ".

Explanation:

This model seems to be a commercial situation affecting businesses buying temporary or one-time pieces. There's only one opportunity to just get the amount correct when buying, though after the period it's required the material and service have no worth.

Therefore, it's the right answer.